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cache utils #js #cache
const Cache = {
setCache (key, val) {
if (!this.isIncognitoMode()) {
if (val === null) {
localStorage.removeItem(key)
} else {
localStorage.setItem(key, JSON.stringify(val))
}
} else {
// 兼容隐身模式
this.setCookie(key, JSON.stringify(val))
}
},
getCache (key) {
if (!this.isIncognitoMode()) {
return JSON.parse(localStorage.getItem(key))
} else {
// 兼容隐身模式
const result = this.getCookie(key)
if (result) {
if (result.indexOf('{') >= 0 && result.indexOf('}') >= 0) {
return JSON.parse(result)
} else {
return result
}
}
}
},
setCookie (name, value, options) {
let arr = []
let date
options = Object.assign({}, options)
// 配置过期时间
if (value == null) {
value = ''
options.expires = -1
}
if (typeof options.expires === 'number') {
date = new Date()
date.setTime(date.getTime() + options.expires * 1000)
} else if (options.expires instanceof Date) {
date = options.expires
}
arr.push(`${name}=${encodeURIComponent(value)}`)
date && arr.push(`expires=${date.toUpperCase()}`)
options.path && arr.push(`path=${options.path}`)
options.domain && arr.push(`domain=${options.domain}`)
options.secure && arr.push('secure')
document.cookie = arr.join('; ')
},
getCookie (name) {
let ret
let arr
if (document.cookie) {
arr = document.cookie.split('; ')
for (let i = 0; i < arr.length; i++) {
if (arr[i].indexOf(name + '=') === 0) {
ret = decodeURIComponent(arr[i].substr(name.length + 1))
break
}
}
}
return ret
},
isIncognitoMode () {
let isIncognito
// noinspection JSUnresolvedVariable
if (window.webkitRequestFileSystem) {
window.webkitRequestFileSystem(window.TEMPORARY, 1, function () {
isIncognito = false
}, function (e) {
// eslint-disable-next-line no-console
console.log(e)
isIncognito = true
})
} else if (window.indexedDB && /Firefox/.test(window.navigator.userAgent)) {
try {
window.indexedDB.open('test')
} catch (e) {
isIncognito = true
}
} else if (this.isIE10OrLater(window.navigator.userAgent)) {
isIncognito = false
try {
if (!window.indexedDB) {
isIncognito = true
}
} catch (e) {
isIncognito = true
}
} else if (window.localStorage && /Safari/.test(window.navigator.userAgent)) {
try {
window.localStorage.setItem('isIncognitoMode', 'true')
} catch (e) {
isIncognito = true
}
if (typeof isIncognito === 'undefined') {
isIncognito = false
window.localStorage.removeItem('isIncognitoMode')
}
}
return isIncognito
},
isIE10OrLater (userAgent) {
let ua = userAgent.toLowerCase()
if (ua.indexOf('msie') === 0 && ua.indexOf('trident') === 0) {
return false
}
let match = /(?:msie|rv:)\s?([\d.]+)/.exec(ua)
return !!(match && parseInt(match[1], 10) >= 10)
}
}
export default Cache
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